将谓语的部分(如be,助动词：do,does,did,have,has,had ...情态动词:can,could,will,would,must,may,should ...)放于主语之前的倒装句语序叫部分倒装。
1）“only + 副词”位于句首时
I realized that I was wrong only then
→Only then did I realize that I was wrong.
You can succeed only by working hard.
→ Only by working hard can you succeed.
He can find his girlfriend only in the reading room
→Only in the reading room can he find his girlfriend.
3）“only + 状语从句”位于句首时
I knew the truth only when I got there
→Only when I got there did I know the truth.
They made a decision only after they had discussed the matter
→Only after they had discussed the matter did they make a decision.
1. Only when thousands of flowers bloom together ________ .
A. spring will be considered here B. could spring be considering here
C. can spring be considered here D. spring can be considered here
2. Only after his death ________considered correct.
A. was his theory B. his theory was
C. did his theory D. had his theory
参考答案：1.C， 2. A